QuakeIndex

Earthquake · reviewed by a seismologist

M 2.4md

Earthquake near Sabana Grande, PR

Yes: an earthquake was likely felt in Sabana Grande in the last 24 hours. M 2.4, 16 km (10 mi) SSE of Sabana Grande, at 3:43 pm AST on 11 November 2026 (19:43 UTC); the estimated shaking in Sabana Grande was intensity II (weak). Every earthquake near Sabana Grande

This page: a magnitude 2.4 earthquake was recorded in Sabana Grande, PR, at 7:09 pm AST on 3 September 2018 (23:09 UTC), 15 km deep.

USGS: Puerto Rico region

36 km (22 mi) WNW of Ponce, PR · 25 km (15 mi) SE of Mayagüez, PR

7:09 pm AST, Sep 3, 2018 · · 15 km deep · released about 110 lb of TNT

Every earthquake near Sabana Grande Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sabana Grande Municipio 2 kmSan Germán Municipio 10 kmYauco Municipio 11 kmMaricao Municipio 12 kmLajas Municipio 13 kmGuánica Municipio 14 kmLas Marías Municipio 18 kmGuayanilla Municipio 18 kmHormigueros Municipio 18 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
7:09 pm AST on 3 September 2018 ()
Where
in Sabana Grande, PR · earthquakes near Sabana Grande
Magnitude
M 2.4 (md)
Depth
15 km below the surface
Felt
no reports yet
Nearest
Sabana Grande Municipio, 2 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2991 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

At this magnitude and depth, people at rest would likely notice it out to about 14 km (9 mi) from the epicentre. Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.

Likely felt in: San Germán 9 km, intensity II · Yauco 12 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 110 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.4 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 140,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 99,000× the energy of this one
  3. Around the size people start to feel M 3.0 8.8× the energy of this one
  4. This earthquake M 2.4 about 110 lb of TNT

Energy from the Gutenberg–Richter relation (log10E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.

Where

Epicentre 18.0670, -66.9565. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Sabana Grande Municipio, PR 2 km (1 mi) NNE earthquakes near Sabana Grande Municipio
San Germán Municipio, PR 10 km (6 mi) WNW earthquakes near San Germán Municipio
Yauco Municipio, PR 11 km (7 mi) ENE earthquakes near Yauco Municipio
Maricao Municipio, PR 12 km (8 mi) N earthquakes near Maricao Municipio
Lajas Municipio, PR 13 km (8 mi) SW earthquakes near Lajas Municipio
Guánica Municipio, PR 14 km (8 mi) SSE earthquakes near Guánica Municipio

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

57 earthquakes have been recorded within 50 km since this one.

  1. 1.9 3 km NE of San Germán, Puerto Rico
  2. 1.9 19 km WNW of Puerto Real, Puerto Rico
  3. 2.4 10 km WSW of Stella, Puerto Rico
  4. 1.8 1 km SSE of Adjuntas, Puerto Rico
  5. 1.9 3 km NE of Mayagüez, Puerto Rico
  6. 1.9 3 km SSE of Maricao, Puerto Rico
  7. 2.0 11 km WNW of Puerto Real, Puerto Rico
  8. 1.8 5 km SW of Adjuntas, Puerto Rico
  9. 1.9 2 km S of Añasco, Puerto Rico
  10. 2.1 3 km SW of Las Marías, Puerto Rico
  11. 2.4 2 km S of San Sebastián, Puerto Rico
  12. 1.8 8 km WSW of Pole Ojea, Puerto Rico
  13. 2.0 11 km NW of Puerto Real, Puerto Rico
  14. 1.9 13 km W of Puerto Real, Puerto Rico
  15. 1.9 3 km W of Sabana Grande, Puerto Rico

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.